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Home >> Hyundai >> 2012 >> Elantra Touring GLS, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> Inspection Chart For Diagnostic Trouble Codes (DTC) >> P0123: Throttle Position Sensor 1 Signal Circuit High Input >> Component Inspection

Component Inspection

  1. Ignition "OFF"
  2. Disconnect TPS connector
  3. Measure resistance between power terminal 3 and ground terminal 2 of TPS connector (Component side)

    Specification :  Approx. 1.6 ~ 2.4 kΩ at all throttle position

  4. With still TPS connector disconnected, measure resistance between signal terminal 1 and ground terminal 2 of TPS connector (Component side)
  5. Operate the throttle valve slowly from the idle position to the full open position and check the resistance changes smoothly in proportion with the throttle valve opening angle.

    Specification :  0.71 ~ 1.38 kΩ at closed throttle valve, 2.7 kΩ at wide open throttle

  6. Is resistance within the specification?

    YES 

    • Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Check TPS for contamination, deterioration, or damage. Substitute with a known-good TPS and check for proper operation. If the problem is corrected, replace TPS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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